C# is a versatile, object-oriented programming language created by Anders Hejlsberg at Microsoft. It is a key language of the .NET platform, designed for developing a wide range of applications, from desktop to web and mobile. C# is characterized by strong typing and a rich set of features, enabling efficient development of both simple scripts and complex enterprise systems. This language offers advanced mechanisms such as LINQ, asynchronous programming, and garbage collection, providing developers with tools to write safe, efficient, and maintainable code. C# also supports integration with various Microsoft technologies and continuous evolution, maintaining syntactic consistency and enabling the development of modern, scalable applications across different platforms.
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namespace MyNamespace
{
class MyClass
{
}
}
MyNamespace.MyClass myObject = new MyNamespace.MyClass();
using MyNamespace;
MyClass myObject = new MyClass();
int numberOfApples;
int numberOfApples = 5;
var numberOfApples = 5; // The compiler will determine that numberOfApples is of type int
int val1 = 10;
int val2 = val1;
val1 = 20;
// Output: 10, because changing the value of val1 does not affect val2.
Console.WriteLine(val2);
StringBuilder sb1 = new StringBuilder("Hello");
StringBuilder sb2 = sb1;
sb1.Append(" World");
// Output: "Hello World", because both variables refer to the same object.
Console.WriteLine(sb2);
int? i = null;
Nullable<int> i = null;
int? myNumber = null;
Console.WriteLine(myNumber.HasValue); // false
myNumber = 10;
Console.WriteLine(myNumber.HasValue); // true
Console.WriteLine(myNumber.Value); // 10
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